Phonograph attachment



O. LIMJHOLM. PHONOGRAPH ATTACHMENT.

APPLICATlOfl FILED HAY 5| 1920.

Patented June 21, 1921.

FFICE.

QSC AR LINDHOLM, CHICAGO, ILLINOIS.

' j PHONOGRAPH ATTACHMENT.

Specification of Letters Patent. Patented June 21, 1921.

Application filed May 5, 1920. Serial No. 379,154.

To all whom it may concern:

Be it known that I, OSCAR LINDHoLM, a subject of the King of Sweden,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Phonograph Attachments,of which thefollowing is a specification.

This invention relates to attachments for phonographs or talkingmachines, and has reference more particularly to an attachment in thenature of an automatic alarm, through the use of which the phonographmay be em ployed to perform the function of an alarm clockto awaken theowner or user at a predetermined hour by playing a musicalsor otherrecord.

against the periphery of theturn table of the instrument so as to holdthe latter against rotation by the motor, and means,

actuated by the hammer or clapper of an ordinary alarm clock forretracting the brake when the alarm is sprung, thus per mitting the turntable to revolveand a record thereon to be'played, the reproducer havingbeen lowered into engagement with the record at the time the deviceisset.

In its most complete form, the invention also includes an" automaticdevice for. retractlng the brake releasing device and permitting theautomatic reapplication of the brake-at-or before the conclusion of theplaying of the record. l he main object of the invention is to provide,for owners and users] of talking ma chines,'an agreeable Substitute fortheordinary harsh and noisy alarm clock as a means of arousing the userfrom sleep at a predetermined hour. 1

In the accompanying drawing, I have illustrated one practicalandapproved emv bodiment of the invention which I have found, in practice,to operate successfully and satisfactorily, and referring thereto-Figurel is a top plan view of a phonograph cabinet, the lid beingremoved to disclose the turn table, reproducer and tone arm, with myattachment applied thereto;

Fig. 2 is a view partly in elevation and partly in vertical section,substantially on the line 2-2 of Fig. 1; and,

Fig. 3 is a fragmentary top plan view, illustrating the position of theparts when theckbrake has been released by the alarm clo 5 Referring tothe drawing, 5 designates, as an entirety, the body of a phonographcabinet, and 6 the usual horizontal partition or platformjust below theturn table and tone arm. 7 designates the turn table, 8 the swingingtone arm, and 9 the reproducer, all as usual in the well known Victrolamachine.

On the table 6 is secured a block 10, to which is pivoted, by a pivotstud 11, a brake lever, one arm 12 of which carries-a leather or likeshoe 13 adapted to bear against the periphery of the turn table 7, andbeing normally drawn into engagement therewith by the tension spring14:. The other arm 15 of Y i with a curved cam surface 16. My inventlonincludes a brake, spring-held Mountedon the table 6 is a plate 17having, at its ends, upstanding apertured lugs 18 which form guides fora sliding push rod 19 mounted therein. The inner end of this rod 19 isalso formed with a curved cam surface 20 which, in its retractedposition, bears against the cam end 16 of the brake lever arm 15, asshown in Fig. 1. Preferably, the rod 19 is encircled by a light coilspring 21 which bears, at one end, against the outer guide lug 18 and,at its other end, against the base of an upstanding handle 22 formed onor attached to the rod 19, this spring lightly urging the rod 19 towardthe brake lever. The spring 21 isso light that, in the set posit-ion ofthe parts shown in Figs. 1 and 2, its force is not suflicientto overcomethe force of the-spring 14:, so that the latter-holds the brake shoe 13engaged with the turntable. V

Pivoted at 23 to a bracket 24 on the under side of the table 6 is alever,-the upper arm 25 of which extends through a slot 26 in the table6 and carries a rubber sleeve 27 on its upper end lying directly behindthe outer end of the rod 19. The lower arm 28 of this lever likewisecarries a rubber sleeve 29 which lies directly behind'the hammer orclapper 30 of an ordinary alarm clock 31 which may beset in a circularopening in the side wall of the cabinet.

WVith the parts in the set positions illustrated in Figs. 1 and 2, whenthe alarm of the clock is released at the predetermined cams past theend 16 of the brake lever, as shown in Fig. 3, thereby retracting thebrake shoe 13 and holding it retracted, permitting the record to beplayed, the playing of the record constituting the alarm for awakeningthe sleeper. The spring 21 has a further function to hold the rod 19 inits inward position (Fig. 3) and prevent it from being accidentallypushed back by the cam end 16 of the brake lever before the playing ofthe record is finished.

The invention, as thus far described, is complete for its main purposeof furnishing a musical alarm for arousing the owner or user at adesired hour; but, in its pre ferred and most complete form, it alsoincludes an automatic means for arresting the playing of the record ator before its completion. This automatic stopping device comprises asimple connection between the tone arm and the rod 19, through which,when the tone arm has reached a predetermined position over the record,it retracts the rod 19, thus permitting the spring 14: to apply thebrake and stop the further playing of the record. To the under side ofthe tone arm is attached a bracket 32, in which is mounted a screw 33.One end of the screw has a head or knob ea by which it may be turned,and on the other end of the screw is a swivel coupling 35 carrying ahook 36 to which may be connected a ring 37 on one end of a cord 38,this latter passing around the guide pulley 39 and being attached to alug 40 on the handle 22. By adjusting the screw 33 in. the bracket 32,when the reproducer reaches the end of the record groove or at any pointprior thereto, the cord 30 is drawn taut, and thereupon retracts the rod19, permitting the spring 14: to reapply the brake and arrest therotation of the turn table.

I claim- 1. In a phonograph attachment of the character described, thecombination with the turn-table of a phonograph, of a pivoted brakelever carrying a brake shoe cooperating with said turn-table, a springnormally acting to apply said brake shoe, a push rod adapted to engagewith and swing said brake lever in a direction to retract said brakeshoe from said turn-table, and an alarm clock having" its hammer solocated as to transmit its vibrations to said push rod and force thesame into engagement with said brake lever.

2. In a phonograph attachment of the character described, thecombination with the turn-table of a phonograph, of a pivoted brakelever carrying a brake shoe cooperating with said turn-table, a springnor mally acting to apply said brake shoe, a push rod having acam-shaped end adapted to have sliding engagement with said brake leverand thereby swing the latter in a directicn to retract said brake shoe,and an alarm clock having its hammer operating upon the other end ofsaid push rod.

3. In a phonograph attachment of the character described, thecombination with the turn-table of a phonograph, of a pivoted brakelever carrying a brake shoe cooperating with said turn-table, a springnormally acting to apply said brake shoe to said turn-table, a push rodhaving a cam-shaped end adapted to have sliding engagement with theouter end of said brake lever and thereby swing the latter in adirection to retract said brake shoe, a light spring urging said pushrod against said brake lever but with insufficient force to retract saidbrake shoe, and an alarm clock having its hammer operating upon theother end of said push rod.

4;. In a phonograph attachment of the character described, thecombination with the turn-table of a phonograph, of a pivoted brakelever carrying a brake shoe cooperating with said turn-table, a springnormally acting to apply said brake shoe, a push rod adapted to engagewith and swing said brake lever in a direction to retract said brakeshoe from said turn-table, an alarm clock having its hammer operatingupon one end of said push rod, and a lengthwise adjustable fiexibleconnection between the tone arm of the instrument and said push rod forretracting the latter on the inward swinging .movement of said tone arm.

OSCAR LINDHOLM.

